Add 'about site' and 'about repo' pages

This commit uses the options and changes from the last few commits to
implement a new 'about' command which works both with and without a
repo.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

2 files changed, 59 insertions, 3 deletions

diff --git a/cmd.c b/cmd.c
index e0eacbe..6cc91e6 100644
--- a/cmd.c
+++ b/cmd.c
@@ -1,112 +1,121 @@
 /* cmd.c: the cgit command dispatcher
  *
  * Copyright (C) 2008 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 #include "cmd.h"
 #include "ui-blob.h"
 #include "ui-commit.h"
 #include "ui-diff.h"
 #include "ui-log.h"
 #include "ui-patch.h"
 #include "ui-refs.h"
 #include "ui-repolist.h"
 #include "ui-snapshot.h"
 #include "ui-summary.h"
 #include "ui-tag.h"
 #include "ui-tree.h"
 
+static void about_fn(struct cgit_context *ctx)
+{
+	if (ctx->repo)
+		cgit_print_repo_readme();
+	else
+		cgit_print_site_readme();
+}
+
 static void blob_fn(struct cgit_context *ctx)
 {
 	cgit_print_blob(ctx->qry.sha1, ctx->qry.path);
 }
 
 static void commit_fn(struct cgit_context *ctx)
 {
 	cgit_print_commit(ctx->qry.sha1);
 }
 
 static void diff_fn(struct cgit_context *ctx)
 {
 	cgit_print_diff(ctx->qry.sha1, ctx->qry.sha2, ctx->qry.path);
 }
 
 static void repolist_fn(struct cgit_context *ctx)
 {
 	cgit_print_repolist();
 }
 
 static void log_fn(struct cgit_context *ctx)
 {
 	cgit_print_log(ctx->qry.sha1, ctx->qry.ofs, ctx->cfg.max_commit_count,
 		       ctx->qry.grep, ctx->qry.search, ctx->qry.path, 1);
 }
 
 static void patch_fn(struct cgit_context *ctx)
 {
 	cgit_print_patch(ctx->qry.sha1);
 }
 
 static void refs_fn(struct cgit_context *ctx)
 {
 	cgit_print_refs();
 }
 
 static void snapshot_fn(struct cgit_context *ctx)
 {
 	cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1,
 			    cgit_repobasename(ctx->repo->url), ctx->qry.path,
 			    ctx->repo->snapshots);
 }
 
 static void summary_fn(struct cgit_context *ctx)
 {
 	cgit_print_summary();
 }
 
 static void tag_fn(struct cgit_context *ctx)
 {
 	cgit_print_tag(ctx->qry.sha1);
 }
 
 static void tree_fn(struct cgit_context *ctx)
 {
 	cgit_print_tree(ctx->qry.sha1, ctx->qry.path);
 }
 
 #define def_cmd(name, want_repo, want_layout) \
 	{#name, name##_fn, want_repo, want_layout}
 
 struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx)
 {
 	static struct cgit_cmd cmds[] = {
+		def_cmd(about, 0, 1),
 		def_cmd(blob, 1, 0),
 		def_cmd(commit, 1, 1),
 		def_cmd(diff, 1, 1),
 		def_cmd(log, 1, 1),
 		def_cmd(patch, 1, 0),
 		def_cmd(refs, 1, 1),
 		def_cmd(repolist, 0, 0),
 		def_cmd(snapshot, 1, 0),
 		def_cmd(summary, 1, 1),
 		def_cmd(tag, 1, 1),
 		def_cmd(tree, 1, 1),
 	};
 	int i;
 
 	if (ctx->qry.page == NULL) {
 		if (ctx->repo)
 			ctx->qry.page = "summary";
 		else
 			ctx->qry.page = "repolist";
 	}
 
 	for(i = 0; i < sizeof(cmds)/sizeof(*cmds); i++)
 		if (!strcmp(ctx->qry.page, cmds[i].name))
 			return &cmds[i];
 	return NULL;
 }
diff --git a/ui-shared.c b/ui-shared.c
index 83758f7..d08ede9 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -21,192 +21,235 @@ static char *http_date(time_t t)
 	static char month[][4] =
 		{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
 		 "Jul", "Aug", "Sep", "Oct", "Now", "Dec"};
 	struct tm *tm = gmtime(&t);
 	return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
 		   tm->tm_mday, month[tm->tm_mon], 1900+tm->tm_year,
 		   tm->tm_hour, tm->tm_min, tm->tm_sec);
 }
 
 void cgit_print_error(char *msg)
 {
 	html("<div class='error'>");
 	html_txt(msg);
 	html("</div>\n");
 }
 
 char *cgit_rooturl()
 {
 	if (ctx.cfg.virtual_root)
 		return fmt("%s/", ctx.cfg.virtual_root);
 	else
 		return ctx.cfg.script_name;
 }
 
 char *cgit_repourl(const char *reponame)
 {
 	if (ctx.cfg.virtual_root) {
 		return fmt("%s/%s/", ctx.cfg.virtual_root, reponame);
 	} else {
 		return fmt("?r=%s", reponame);
 	}
 }
 
 char *cgit_fileurl(const char *reponame, const char *pagename,
 		   const char *filename, const char *query)
 {
 	char *tmp;
 	char *delim;
 
 	if (ctx.cfg.virtual_root) {
 		tmp = fmt("%s/%s/%s/%s", ctx.cfg.virtual_root, reponame,
 			  pagename, (filename ? filename:""));
 		delim = "?";
 	} else {
 		tmp = fmt("?url=%s/%s/%s", reponame, pagename,
 			  (filename ? filename : ""));
 		delim = "&";
 	}
 	if (query)
 		tmp = fmt("%s%s%s", tmp, delim, query);
 	return tmp;
 }
 
 char *cgit_pageurl(const char *reponame, const char *pagename,
 		   const char *query)
 {
 	return cgit_fileurl(reponame,pagename,0,query);
 }
 
 const char *cgit_repobasename(const char *reponame)
 {
 	/* I assume we don't need to store more than one repo basename */
 	static char rvbuf[1024];
 	int p;
 	const char *rv;
 	strncpy(rvbuf,reponame,sizeof(rvbuf));
 	if(rvbuf[sizeof(rvbuf)-1])
 		die("cgit_repobasename: truncated repository name '%s'", reponame);
 	p = strlen(rvbuf)-1;
 	/* strip trailing slashes */
 	while(p && rvbuf[p]=='/') rvbuf[p--]=0;
 	/* strip trailing .git */
 	if(p>=3 && !strncmp(&rvbuf[p-3],".git",4)) {
 		p -= 3; rvbuf[p--] = 0;
 	}
 	/* strip more trailing slashes if any */
 	while( p && rvbuf[p]=='/') rvbuf[p--]=0;
 	/* find last slash in the remaining string */
 	rv = strrchr(rvbuf,'/');
 	if(rv)
 		return ++rv;
 	return rvbuf;
 }
 
 char *cgit_currurl()
 {
 	if (!ctx.cfg.virtual_root)
 		return ctx.cfg.script_name;
 	else if (ctx.qry.page)
 		return fmt("%s/%s/%s/", ctx.cfg.virtual_root, ctx.qry.repo, ctx.qry.page);
 	else if (ctx.qry.repo)
 		return fmt("%s/%s/", ctx.cfg.virtual_root, ctx.qry.repo);
 	else
 		return fmt("%s/", ctx.cfg.virtual_root);
 }
 
+static void site_url(char *page, char *search)
+{
+	char *delim = "?";
+
+	if (ctx.cfg.virtual_root) {
+		html_attr(ctx.cfg.virtual_root);
+		if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
+			html("/");
+	} else
+		html(ctx.cfg.script_name);
+
+	if (page) {
+		htmlf("?p=%s", page);
+		delim = "&";
+	}
+	if (search) {
+		html(delim);
+		html("q=");
+		html_attr(search);
+	}
+}
+
+static void site_link(char *page, char *name, char *title, char *class,
+		       char *search)
+{
+	html("<a");
+	if (title) {
+		html(" title='");
+		html_attr(title);
+		html("'");
+	}
+	if (class) {
+		html(" class='");
+		html_attr(class);
+		html("'");
+	}
+	html(" href='");
+	site_url(page, search);
+	html("'>");
+	html_txt(name);
+	html("</a>");
+}
+
 static char *repolink(char *title, char *class, char *page, char *head,
 		      char *path)
 {
 	char *delim = "?";
 
 	html("<a");
 	if (title) {
 		html(" title='");
 		html_attr(title);
 		html("'");
 	}
 	if (class) {
 		html(" class='");
 		html_attr(class);
 		html("'");
 	}
 	html(" href='");
 	if (ctx.cfg.virtual_root) {
 		html_attr(ctx.cfg.virtual_root);
 		if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
 			html("/");
 		html_attr(ctx.repo->url);
 		if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 			html("/");
 		if (page) {
 			html(page);
 			html("/");
 			if (path)
 				html_attr(path);
 		}
 	} else {
 		html(ctx.cfg.script_name);
 		html("?url=");
 		html_attr(ctx.repo->url);
 		if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 			html("/");
 		if (page) {
 			html(page);
 			html("/");
 			if (path)
 				html_attr(path);
 		}
 		delim = "&amp;";
 	}
 	if (head && strcmp(head, ctx.repo->defbranch)) {
 		html(delim);
 		html("h=");
 		html_attr(head);
 		delim = "&amp;";
 	}
 	return fmt("%s", delim);
 }
 
 static void reporevlink(char *page, char *name, char *title, char *class,
 			char *head, char *rev, char *path)
 {
 	char *delim;
 
 	delim = repolink(title, class, page, head, path);
 	if (rev && strcmp(rev, ctx.qry.head)) {
 		html(delim);
 		html("id=");
 		html_attr(rev);
 	}
 	html("'>");
 	html_txt(name);
 	html("</a>");
 }
 
 void cgit_tree_link(char *name, char *title, char *class, char *head,
 		    char *rev, char *path)
 {
 	reporevlink("tree", name, title, class, head, rev, path);
 }
 
 void cgit_log_link(char *name, char *title, char *class, char *head,
 		   char *rev, char *path, int ofs, char *grep, char *pattern)
 {
 	char *delim;
 
 	delim = repolink(title, class, "log", head, path);
 	if (rev && strcmp(rev, ctx.qry.head)) {
 		html(delim);
 		html("id=");
 		html_attr(rev);
 		delim = "&";
 	}
 	if (grep && pattern) {
 		html(delim);
 		html("qt=");
 		html_attr(grep);
 		delim = "&";
 		html(delim);
 		html("q=");
 		html_attr(pattern);
 	}
@@ -438,162 +481,166 @@ int print_archive_ref(const char *refname, const unsigned char *sha1,
 	html_link_close();
 	return 0;
 }
 
 void add_hidden_formfields(int incl_head, int incl_search, char *page)
 {
 	char *url;
 
 	if (!ctx.cfg.virtual_root) {
 		url = fmt("%s/%s", ctx.qry.repo, page);
 		if (ctx.qry.path)
 			url = fmt("%s/%s", url, ctx.qry.path);
 		html_hidden("url", url);
 	}
 
 	if (incl_head && strcmp(ctx.qry.head, ctx.repo->defbranch))
 		html_hidden("h", ctx.qry.head);
 
 	if (ctx.qry.sha1)
 		html_hidden("id", ctx.qry.sha1);
 	if (ctx.qry.sha2)
 		html_hidden("id2", ctx.qry.sha2);
 
 	if (incl_search) {
 		if (ctx.qry.grep)
 			html_hidden("qt", ctx.qry.grep);
 		if (ctx.qry.search)
 			html_hidden("q", ctx.qry.search);
 	}
 }
 
 char *hc(struct cgit_cmd *cmd, const char *page)
 {
 	return (strcmp(cmd->name, page) ? NULL : "active");
 }
 
 void cgit_print_pageheader(struct cgit_context *ctx)
 {
 	struct cgit_cmd *cmd = cgit_get_cmd(ctx);
 
 	html("<table id='header'>\n");
 	html("<tr>\n");
 	html("<td class='logo' rowspan='2'><a href='");
 	if (ctx->cfg.logo_link)
 		html_attr(ctx->cfg.logo_link);
 	else
 		html_attr(cgit_rooturl());
 	html("'><img src='");
 	html_attr(ctx->cfg.logo);
 	html("' alt='cgit logo'/></a></td>\n");
 
 	html("<td class='main'>");
 	if (ctx->repo) {
 		reporevlink(NULL, ctx->repo->name, NULL, hc(cmd, "summary"),
 			    ctx->qry.head, NULL, NULL);
 		html(" : ");
 		html_txt(ctx->qry.page);
 		html("</td><td class='form'>");
 		html("<form method='get' action=''>\n");
 		add_hidden_formfields(0, 1, ctx->qry.page);
 		html("<select name='h' onchange='this.form.submit();'>\n");
 		for_each_branch_ref(print_branch_option, ctx->qry.head);
 		html("</select> ");
 		html("<input type='submit' name='' value='switch'/>");
 		html("</form>");
 	} else
 		html_txt(ctx->cfg.root_title);
 	html("</td></tr>\n");
 
 	html("<tr><td class='sub'");
 	if (ctx->repo) {
 		html(" colspan='2'>");
 		html_txt(ctx->repo->desc);
 	} else {
 		html(">");
 		if (ctx->cfg.root_desc)
 			html_txt(ctx->cfg.root_desc);
 		else if (ctx->cfg.index_info)
 			html_include(ctx->cfg.index_info);
 	}
 	html("</td></tr></table>\n");
 
 	html("<table class='tabs'><tr><td>\n");
 	if (ctx->repo) {
 		reporevlink(NULL, "summary", NULL, hc(cmd, "summary"),
 			    ctx->qry.head, NULL, NULL);
 		cgit_refs_link("refs", NULL, hc(cmd, "refs"), ctx->qry.head,
 			       ctx->qry.sha1, NULL);
 		cgit_log_link("log", NULL, hc(cmd, "log"), ctx->qry.head,
 			      NULL, NULL, 0, NULL, NULL);
 		cgit_tree_link("tree", NULL, hc(cmd, "tree"), ctx->qry.head,
 			       ctx->qry.sha1, NULL);
 		cgit_commit_link("commit", NULL, hc(cmd, "commit"),
 				 ctx->qry.head, ctx->qry.sha1);
 		cgit_diff_link("diff", NULL, hc(cmd, "diff"), ctx->qry.head,
 			       ctx->qry.sha1, ctx->qry.sha2, NULL);
+		if (ctx->repo->readme)
+			reporevlink("about", "about", NULL,
+				    hc(cmd, "about"), ctx->qry.head, NULL,
+				    NULL);
 		html("</td><td class='form'>");
 		html("<form class='right' method='get' action='");
 		if (ctx->cfg.virtual_root)
 			html_attr(cgit_fileurl(ctx->qry.repo, "log",
 					       ctx->qry.path, NULL));
 		html("'>\n");
 		add_hidden_formfields(1, 0, "log");
 		html("<select name='qt'>\n");
 		html_option("grep", "log msg", ctx->qry.grep);
 		html_option("author", "author", ctx->qry.grep);
 		html_option("committer", "committer", ctx->qry.grep);
 		html("</select>\n");
 		html("<input class='txt' type='text' size='10' name='q' value='");
 		html_attr(ctx->qry.search);
 		html("'/>\n");
 		html("<input type='submit' value='search'/>\n");
 		html("</form>\n");
 	} else {
-		html("<a class='active' href='");
-		html_attr(cgit_rooturl());
-		html("'>index</a>\n");
+		site_link(NULL, "index", NULL, hc(cmd, "repolist"), NULL);
+		if (ctx->cfg.root_readme)
+			site_link("about", "about", NULL, hc(cmd, "about"), NULL);
 		html("</td><td class='form'>");
 		html("<form method='get' action='");
 		html_attr(cgit_rooturl());
 		html("'>\n");
 		html("<input type='text' name='q' size='10' value='");
 		html_attr(ctx->qry.search);
 		html("'/>\n");
 		html("<input type='submit' value='search'/>\n");
 		html("</form>");
 	}
 	html("</td></tr></table>\n");
 	html("<div class='content'>");
 }
 
 void cgit_print_filemode(unsigned short mode)
 {
 	if (S_ISDIR(mode))
 		html("d");
 	else if (S_ISLNK(mode))
 		html("l");
 	else if (S_ISGITLINK(mode))
 		html("m");
 	else
 		html("-");
 	html_fileperm(mode >> 6);
 	html_fileperm(mode >> 3);
 	html_fileperm(mode);
 }
 
 void cgit_print_snapshot_links(const char *repo, const char *head,
 			       const char *hex, int snapshots)
 {
 	const struct cgit_snapshot_format* f;
     	char *filename;
 
 	for (f = cgit_snapshot_formats; f->suffix; f++) {
 		if (!(snapshots & f->bit))
 			continue;
 		filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
 			       f->suffix);
 		cgit_snapshot_link(filename, NULL, NULL, (char *)head,
 				   (char *)hex, filename);
 		html("<br/>");
 	}
 }